A method of adjusting the operating or timing margin of a clocked system, such as a digital computer or a memory controller, is disclosed. The method may be automated to occur upon every initial program load or can be manually adjusted for changes in frequency, operating voltages, or applications in...http://www.google.de/patents/US6535986?utm_source=gb-gplus-sharePatent US6535986 - Optimizing performance of a clocked system by adjusting clock control settings and clock frequency
